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4

Petrol is distilled at

A. 65° to 220°C

B. 220° to 345°C

C. 345° to 470°C

D. 470° to 550°C

Correct Answer :

A. 65° to 220°C


Related Questions

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4

Which of the following cycles has maximum efficiency?

A. Rankine

B. Stirling

C. Carnot

D. Brayton

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The efficiency of a Carnot engine depends on

A. Working substance

B. Design of engine

C. Size of engine

D. Temperatures of source and sink

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4

The compression ratio for petrol engines is

A. 3 to 6

B. 5 to 8

C. 10 to 20

D. 15 to 30

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4

The property of a material by virtue of which it can be beaten or rolled into plates is called

A. Malleability

B. Ductility

C. Plasticity

D. Elasticity

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4

The hyperbolic process is governed by

A. Boyle's law

B. Charles' law

C. Gay-Lussac law

D. Avogadro's law

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4

The heat and work are mutually convertible. This statement is called __________ law of thermodynamics.

A. Zeroth

B. First

C. Second

D. Third

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4

For which material the Poisson's ratio is more than unity

A. Steel

B. Copper

C. Aluminium

D. None of the above

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4

Otto cycle is also known as

A. Constant pressure cycle

B. Constant volume cycle

C. Constant temperature cycle

D. Constant temperature and pressure cycle

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4

The general gas equation is (where p = Pressure, v = Volume, m = mass, T = Absolute temperature, and R = Gas constant)

A. pv = mRT

B. pv = RTm

C. pvm = C

D. pv = (RT)m

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4

The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)

A. rγ - 1

B. 1 - rγ - 1

C. 1 - (1/r) γ/γ - 1

D. 1 - (1/r) γ - 1/ γ

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4

When the gas is heated at constant pressure, the heat supplied

A. Increases the internal energy of the gas

B. Increases the temperature of the gas

C. Does some external work during expansion

D. Both (B) and (C)

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4

Reversed Joule cycle is known as

A. Carnot cycle

B. Bell-Coleman cycle

C. Rankine cycle

D. Stirling cycle

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4

The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is

A. 2/3

B. 3/4

C. 1

D. 9/8

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4

The ratio of molar specific heats for mono-atomic gas is

A. 1

B. 1.4

C. 1.67

D. 1.87

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4

The efficiency of the dual combustion cycle for the same compression ratio is __________ Diesel cycle.

A. Greater than

B. Less than

C. Equal to

D. None of these

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4

For riveting, the size of hole drilled in plates is __________ shank diameter of rivet.

A. Equal to

B. Less than

C. Greater than

D. None of these

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4

In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called

A. Creeping

B. Yielding

C. Breaking

D. Plasticity

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4

The maximum bending moment for the beam shown in the below figure, is

A. wl²/3√3

B. wl²/6√3

C. wl²/9√3

D. wl²/12√3

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4

The efficiency of Diesel cycle approaches to Otto cycle efficiency when

A. Cut-off is increased

B. Cut-off is decreased

C. Cut-off is zero

D. Cut-off is constant

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4

The general law for the expansion or compression of gases, is

A. pv = C

B. pv = m R T

C. pvn = C

D. pvγ = C

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4

The radius of the Mohrs circle in the given figure is equal to

A. Sum of two principal stresses

B. Difference of two principal stresses

C. Half the sum of two principal stresses

D. Half the difference of two principal stresses

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4

The cycle in which heat is supplied at constant volume and rejected at constant pressure is known as

A. Dual combustion cycle

B. Diesel cycle

C. Atkinson cycle

D. Rankine cycle

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4

The general law of expansion or compression is pvn = C, The process is said to be hyperbolic, if n is equal to

A. 0

B. 1

C. γ

D.

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4

The atomic mass of sulphur is

A. 12

B. 14

C. 16

D. 32

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4

In a free expansion process,

A. W1 - 2 = 0

B. Q1 - 2 = 0

C. dU = 0

D. All of these

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4

The weakest section of a diamond riveting is the section which passes through

A. The first row

B. The second row

C. The central row

D. One rivet hole of the end row

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4

Which of the following is the correct statement of the second law of thermodynamics?

A. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.

B. It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.

C. There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.

D. All of the above

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4

Steam coal is a

A. Pulverised coal

B. Brown coal

C. Coking bituminous coal

D. Non-coking bituminous coal

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4

For the same compression ratio, the efficiency of dual combustion cycle is

A. Greater than Diesel cycle and less than Otto cycle

B. Less than Diesel cycle and greater than Otto cycle

C. Greater than Diesel cycle

D. Less than Diesel cycle

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4

When a gas is heated, change takes place in

A. Pressure

B. Volume

C. Temperature

D. All of these